JP2013526223A - Method and apparatus for sending a buffer status report in a wireless network - Google Patents

Abstract

  The present invention proposes a method and apparatus for transmitting a buffer status report in a wireless network. The amount of data to be transmitted after the user equipment is composed of multiple component carriers and the user equipment generates each media access layer protocol data unit corresponding to each component carrier. , Generate an uplink buffer status report message according to the amount of data to be transmitted, and report the uplink buffer status report message to the base station serving the user equipment. The present invention addresses the issue of how to report buffer status information when there are multiple media access layer protocol data units within a transmission time interval. With the solution of the present invention, the base station can determine decisively how many uplink resources can be allocated to the user equipment in order to guarantee more efficient scheduling.

Description

  The present disclosure relates to wireless communication, and in particular, to a base station and user equipment based on carrier aggregation in LTE-A.

  The buffer status report (BSR) is very important in the uplink system because it provides user equipment (UE) side information necessary for scheduling at the base station (evolved Node B, ie eNB). . In Long Term Evolution Advanced (LTE-A) Release 8/9, the buffer status report is one media access control protocol data unit (MAC PDU) within each transmission time interval (TTI). ) Is relatively simple. However, in LTE-A Release 10, multiple MAC PDUs can be transmitted within one TTI by introducing carrier aggregation (CA), that is, multiple component carriers (CC). Therefore, it is desirable to address some new issues that arise with buffer status reports.

  The present invention takes into account new features in LTE-A to establish rules for buffer status reporting. The present invention provides a buffer status reporting mechanism for communication systems with carrier aggregation.

  According to a first aspect of the present invention, there is provided a method for reporting an uplink buffer status report message in a user equipment configured with a plurality of component carriers. B. obtaining an amount of data to be transmitted after each media access layer protocol data unit corresponding to each component carrier is generated; Generating an uplink buffer status report message according to the amount of data to be transmitted; Reporting an uplink buffer status report message to a base station serving the user equipment.

  According to a second aspect of the present invention, there is provided an apparatus for reporting an uplink buffer status report message in a user equipment configured with a plurality of component carriers, the apparatus comprising: A first acquisition device configured to acquire an amount of data to be transmitted after each media access layer protocol data unit corresponding to the carrier is generated, and data to be transmitted Reporting uplink buffer status report messages to a generating station configured to generate uplink buffer status report messages according to the amount of and a base station serving the user equipment Configured reporting device.

  The present invention addresses the problem of how to report buffer status information when there are multiple transmission blocks, ie, multiple media access layer protocol data units, within one transmission time interval.

  With the solution of the present invention, the base station can determine decisively how many uplink resources can be allocated to the user equipment in order to guarantee more efficient scheduling.

  The present invention can utilize padding buffer status report messages from different perspectives such as reliability, efficiency and accuracy, thereby improving the reliability of buffer status report messages and Efficiency can be improved or the accuracy of the buffer status report message can be improved.

  Embodiments of the present invention preferably further provide increment information for the buffer size table with a coarse granularity to further improve accuracy.

  The foregoing and other features, objects, and advantages of the present invention will become apparent upon review of the following detailed description of non-limiting embodiments given with reference to the drawings.

1 is a schematic diagram of a network topology according to an embodiment of the present invention. FIG. 3 is a flow diagram of a system method according to an embodiment of the present invention. 4 is an example of a long BSR included as a standard / periodic BSR in a MAC PDU according to an embodiment of the present invention. 4 is an example of a short BSR corresponding to a logical channel group having first priority according to an embodiment of the present invention. FIG. 4 is an example of a short BSR corresponding to a logical channel group with second priority according to an embodiment of the present invention. 1 is a block diagram of an apparatus according to an embodiment of the present invention.

  Throughout the drawings, the same or similar reference numerals refer to the same or similar components.

  First, in order to make it easier to read and understand the technical solution of the present invention, this description gives a brief introduction to the types of BSR and trigger procedures.

  The basic idea of scheduling at the base station is that radio resources are allocated only to the UE or transmitted from the UE when there is data that can be transmitted or received. On the downlink, the amount of data to be transmitted to each UE is clearly known to the base station scheduler. However, in the uplink direction, the scheduling decision is made at the base station and the data buffer is located at the UE, so how many UE data in total are stored in the uplink buffer area to be transmitted. Provide information to the base station so that the base station can allocate and schedule resources according to uplink resource buffer information from the UE, thereby wasting resource allocation to the UE that would normally result in wasted resources Or, to avoid scheduling, the UE needs to report a BSR message to the base station.

  Two configured timers including a periodic BSR timer (periodic BSR timer) and a standard BSR timer (retxBSR timer), and if there is any signaling logical channel group per logical channel, radio resource control (RRC ) Indicates which logical channel group (LCG) this logical channel belongs to.

A BSR message can be triggered when the following situation occurs:
-There is a logical channel belonging to a specific logical channel group and having uplink data (eg RLC / PDCP control information, service data, etc.) to be present and transmitted in an RLC or PDCP entity, or a specific logical Any data that has a higher priority than any logical channel that belongs to the channel group and that has data to be transmitted, or that any of the logical channels that belong to a particular logical channel group should be transmitted (Ie, a BSR with a buffer area size of 0 may be transmitted for synchronization of buffer area information between the eNB and the UE). A BSR triggered in these situations is also referred to as a “standard BSR”.
-Uplink resources are allocated and the number of padding bits is greater than or equal to the BSR MAC control element plus its sub-header, and the BSR triggered at this time belongs to "Padding BSR".
-The retx BSR timer expires and any logical channel belonging to a specific logical channel group has data to be transmitted, and the BSR triggered at this time belongs to the "standard BSR". and,
-The periodic BSR timer expires and the BSR triggered at this time belongs to the "periodic BSR".

For standard and periodic BSR
A long BSR is reported if multiple logical channel groups (LCG) have data to be transmitted in the current TTI where the BSR is transmitted.
-Otherwise, a short BSR is reported.

About Padding BSR
If the number of padding bits is greater than or equal to the short BSR control element plus its subheader but less than the long BSR control element plus its subheader,
-If more than one logical channel group (LCG) has data to be transmitted in the current TTI to which the BSR is transmitted, a truncated BSR is reported and this BSR has the data to be transmitted Carries the logical channel group to which the highest priority logical channel belongs.
-Otherwise, a short BSR is reported.
A long BSR is reported if the number of padding bits is greater than or equal to the long BSR control element plus its subheader.

  Thus, when transmitting a long BSR, a short or truncated BSR may indicate that the total number of valid uplink transmission resources for transmission of the BSR, the number of logical signals for non-empty buffers, and certain events Determined by whether it is triggered at the UE. Long BSR reports the amount of buffer data for four logical channel groups, and short BSR reports the amount of uplink buffer data for one logical channel group.

  FIG. 1 shows a diagram of a network topology according to an embodiment of the present invention, where a base station 2 serves a user equipment 1 and the user equipment 1 reports a BSR to the base station 2.

  FIG. 2 shows a flow diagram of a system method according to an embodiment of the present invention.

  First, in step S20, the user apparatus 1 is configured with at least one component carrier, and the user apparatus 1 generates each media access layer protocol data unit corresponding to each component carrier. After that, get the amount of data to be transmitted. In LTE-A, a plurality of CCs are simultaneously transmitted within one TTI, one MAC PDU is encapsulated via one CC, and the CC corresponds one-to-one with the MAC PDU. Therefore, in the CA scenario, a plurality of MAC PDUs can be transmitted simultaneously in one TTI. The BSR transmitted from the user equipment 1 to the base station 2 is sent to the base station 2 by the amount of data in the uplink buffer of the user equipment 1 suitable for transmission, in particular, all the MAC PDUs via the respective component carriers. Used to provide the amount of data in the buffer that should be transmitted after it has been created.

  Further, the buffer status report MAC control element can include a long BSR format and a short BSR / truncated BSR format.

  Next, in step S21, the user equipment 1 generates an uplink buffer status report message according to the amount of data to be transmitted. Next, in step S22, the user equipment 1 reports an uplink buffer status report message to the base station 2 serving the user equipment 1.

  Step S21 for generating a BSR and step S22 for reporting a BSR in a CA scenario are described in detail below for standard / periodic BSR and padding BSR, respectively.

Standard / Regular BSR
Since standard / periodic BSR provides user specific information instead of CC specific information, ie standard / periodic BSR is independent of CC, multiple BSRs need to be reported via different CCs within one TTI There is no. Therefore, in step S21, even if there are multiple MAC PDUs via different CCs in one TTI, the user equipment 1 simply encapsulates only one standard / periodic BSR in one CC's MAC PDU. it can. In other words, for standard / periodic BSR, the user equipment 1 reports only one BSR per TTI in the carrier aggregation scenario.

  The method by which the user equipment 1 determines in which MAC PDU the BSR should be included is described in the embodiments below.

  One skilled in the art will understand that service data over at least one logical channel is multiplexed in one MAC PDU, and different logical channels have different priorities. In order to guarantee quality of service (QoS), first carry UCI while maintaining the transmission power of the signal transmitted via physical uplink shared channel (PUSCH) carrying uplink control information (UCI). Power is adjusted by reducing the transmission power of the signal transmitted through the PUSCH, and the UCI includes BSR, power remainder, etc., that is, the PUSCH carrying the UCI has higher priority than the PUSCH carrying no UCI. That is, the PUSCH carrying the MAC control element has higher priority. That is, the BSR has a higher priority. Therefore, the BSR should be included in the same MAC PDU carrying data belonging to the channel with the highest priority, i.e., in step S21, the user equipment 1 along with the data from the logical channel with the highest priority, The standard / periodic BSR is encapsulated in the same MAC PDU, for example, the user equipment encapsulates the standard / periodic BSR in the same MAC PDU together with data having the highest QoS requirement, eg VoIP service data, to the base station 2 Send MAC PDU. Next, in step S22, the user apparatus 1 reports the MAC PDU in which the standard / periodic BSR is encapsulated to the base station 2.

Padding BSR
In LTE-A Release 8, padding BSR will be triggered if there are enough padding bits to support short BRS / truncated BSR or long BSR, as described above. In Release 8, since only one MAC PDU is transmitted within one TTI, the maximum number of padding BSRs composed of a plurality of padding bits is one. In the carrier aggregation scenario, since there are multiple MAC PDUs, multiple padding BSRs are possible.

  Currently, there are two alternative solutions for creating a MAC PDU in the CA scenario: one generates one MAC PDU until the corresponding data is encapsulated in each MAC PDU, Then encapsulating MAC PDUs sequentially in a particular order by encapsulating at least a portion of the remaining data to be transmitted into the next MAC PDU, and so on, and the other is Encapsulating MAC PDUs sent in parallel via their respective component carriers. Therefore, the following considers each of these two situations of serial and parallel encapsulation, and first discusses serial generation of MAC PDUs via their respective CCs.

  (1) MAC PDUs over different CCs are serially encapsulated in a specific order.

  When a standard / periodic BSR is triggered, then the BSR (long BSR or short BSR) is transmitted over one CC, and the padding bits in other MAC PDUs of other CCs are transmitted in the padding BSR Can be allowed for. We discuss different usage solutions for these padding BSRs.

  Solution A: The BSR in the padding bits is transmitted repeatedly.

  The user equipment 1 generates an uplink buffer status report message in a MAC PDU corresponding to one component carrier, and the user equipment is able to pad at least one other MAC PDU with padding bits. Repetitively place at least part of the contents of the uplink buffer status report message in the bit, i.e. the user equipment 1 copies the entire standard / periodic BSR or a part of it Transmit in the form of long BSR or short / truncated BSR based on the bits.

  Step S21 can be divided into the following substeps.

  First, in sub-step S210, the user apparatus 1 acquires the size of padding bits.

  Then, in substep S211, the user equipment 1 repeatedly arranges all the contents of the uplink buffer status report message in the padding bits of other subsequent MAC PDUs having padding bits, and Are transmitted in the same TTI and if the padding bits are sufficient to contain all the contents of the uplink buffer status report message, ie if the standard / periodic BSR is a long BSR, the long BSR is If supported in the padding bits, the padding BSR is the same as the standard / periodic BSR.

  Alternatively, the user equipment 1 sequentially places part of the contents of the uplink buffer status report message in the padding bits of other subsequent MAC PDUs with padding bits, which are the same TTI If the padding bits are sufficient to contain part of the contents of the uplink buffer status report message, i.e. the padding BSR contains part of the buffer status information of the standard / periodic BSR If so, if the standard / periodic BSR is a long BSR and the padding BSR is a short / truncated BSR, this part belongs to the LCG with higher priority. This principle can also be applied to scenarios where there is only padding BSR when standard / periodic BSR is not triggered. The flow of generating standard / periodic BSR and then padding BSR when MAC PDUs are generated serially in a CA scenario will be described in detail below with reference to FIGS.

  For example, there are three MAC PDUs to be transmitted within one TTI. When the standard / periodic BSR is triggered, the user equipment 1 transmits the standard / periodic BSR within one MAC PDU. In a preferred embodiment, in step S21, a standard / periodic BSR is encapsulated in one MAC PDU for transmission, eg, the BSR is encapsulated in a serial data packet to be generated first, and a padding BSR. Are supported in both of the remaining two MAC PDUs.

  In one embodiment, buffer status information, or BSR, is reported from four logical channel groups (LCGs), and a long BSR as shown in FIG. 3 is included in a single MAC PDU as a standard / periodic BSR. Therefore, step S21 can be further subdivided into the following sub-steps S210, S211 and S211 '. In sub-step S210, the user equipment 1 obtains the size of padding bits of the next serial MAC PDU, and the size of the padding bits of the next serial MAC PDU includes all contents of the standard / periodic BSR. Decide whether it is enough. If the padding bit is sufficient to contain all the content of the standard / periodic BSR, then in sub-step S211, the user equipment 1 fills all the content of the standard / periodic BSR in the padding bit and If the bits are not sufficient to contain all the content of the standard / periodic BSR, eg if only BSR with a short padding bit size can be supported, then in sub-step S211 ′, the user equipment 1 Fills a portion of the standard / periodic BSR content in the padding bits of the MAC PDU. According to a preferred embodiment, in sub-step S211 ′, according to the priority order of the logical channel group corresponding to the BSR, the user equipment 1 first has the logical channel with the highest priority in the padding bits of the next serial MAC PDU. Fill the corresponding BSR information of the group and then fill the corresponding BSR information of the logical channel group with the second highest priority in the padding bits of the further MAC PDU. Sub-step S211 'will be described in detail with reference to FIG. 3, FIG. 4, and FIG.

  In FIG. 3, the long BSR is adopted as a standard / periodic BSR, with buffer status information for each of the four logical channel groups, ie the amount of corresponding data to be transmitted over the four logical channel groups. Each of the uplink buffer status information of logical channel group (LCG) # 0, the uplink buffer status information of logical channel group # 1, and the uplink buffer status information of logical channel group # 2 And uplink buffer status information for logical channel group # 3. The existing protocol architecture occupies 6 bits for each logical channel group's uplink buffer status information, and logical channel group # 0 has higher priority than logical channel group # 1. Logical channel group # 1 has a higher priority than logical channel group # 2, and logical channel group # 2 has a higher priority than logical channel group # 3. If the padding BSRs in the other two subsequent MAC PDUs support only short BSRs, the user equipment 1 may use a MAC PDU in which a long BSR as a standard / periodic BSR is encapsulated as shown in FIG. As the short BSR in the next MAC PDU, first fill the logical channel group having the first priority, ie logical channel group # 0, and in the next MAC PDU next to the next MAC PDU as shown in FIG. As a short BSR, the logical channel group having the second priority, that is, the logical channel group # 1 is satisfied. Further, in step S22, the user equipment 1 performs a short BSR for the LCG having the first priority as shown in FIG. 4 and a short BSR for the LCG having the second priority as shown in FIG. , Each transmitting in two MAC PDUs.

  In other embodiments, if one padding BSR can support a long BSR and the other padding BSR can only support a short BSR, the long BSR as shown in FIG. 3 can be in one MAC PDU that supports the long BSR. The short BSR for the LCG with the first LCG as shown in FIG. 4 is included in other MAC PDUs supporting the short BSR.

  That is, the entire standard / periodic BSR or a copy of a portion thereof can be transmitted in padding bits to improve transmission reliability.

Solution B: If user equipment 1 serially encapsulates MAC PDUs, the standard / periodic BSR is originally scheduled to be transmitted in the nth MAC PDU in one TTI, where n ≦ N, where N represents the total number of MAC PDUs transmitted in one TTI, and in one embodiment standard / periodic BSR can be scheduled to be transmitted in serial MAC PDUs in one TTI; Finally encapsulated. Accordingly, step S21 may further include including at least a portion of the BSR in the padding bits of one or more MAC PDUs encapsulated prior to the nth MAC PDU.
The user equipment 1 then determines whether the overall standard / periodic BSR or part thereof was included in the padding bits of at least one MAC PDU encapsulated before the nth MAC PDU. To do.

  If at least one previously encapsulated MAC PDU includes an overall BSR to be reported, for example, user equipment 1 may send buffer status information in the standard / periodic BSR prior to the nth MAC PDU. If included within the padding bits of one or more encapsulated MAC PDUs, the standard / periodic BSR cannot be included in the nth MAC PDU, and so it originally loads the BSR there. The nth MAC PDU byte that was scheduled can be reserved for data content encapsulation.

  If the previously encapsulated MAC PDU does not contain a BSR or contains only a part of the buffer status information, the user equipment 1 will send the remaining BSR information to the nth encapsulated MAC PDU. Including. In particular, if two or more LCG BSR information is not included in the previous MAC PDU, the user equipment 1 transmits the buffer information of the plurality of LCGs in the nth MAC PDU in the long BSR, and only one LCG If the BSR information is not included in the previous MAC PDU, the user equipment 1 should include a short BSR in the nth MAC PDU. A part of the content of the BSR, for example, LCG # 0 buffer size information, LCG # 1 buffer size information, and LCG # 2 buffer size information is at least one MAC PDU preceding the nth MAC PDU The user equipment 1 can simply include the LCG # 3 buffer size information in the nth MAC PDU only in the short BSR or the truncated BSR, and the service data Can be transmitted in spare bits.

  That is, Solution A and Solution B described above encapsulate MAC PDUs from the viewpoints of reliability and efficiency, respectively. Solution A can repeatedly transmit BSR in multiple MAC PDUs and improve transmission reliability for multiple transmissions. Solution B can improve the efficiency of transmission in that more data can be transmitted in the spare bits by making full use of the padding bits.

  (2) All MAC PDUs are encapsulated in parallel in one TTI.

  In this solution, all MAC PDUs are encapsulated in parallel, and the user equipment 1 encapsulating one MAC PDU does not know whether there are padding bits in the other MAC PDUs, so the MAC PDU serial Only solution A introduced for encapsulation can be applied to the padding bits, i.e. the entire standard / periodic BSR or part of it can be transmitted in the padding BSR, thereby improving the transmission reliability To do.

  (3) BSR mapping table

  Further, the padding bits can further provide incremental information about the BSR mapping table with a coarse granularity, thereby improving the accuracy of the BSR mapping table.

  The buffer size table, Table 1, defines the maximum buffer size level determined by the uplink peak rate multiplied by the desired response time. However, the buffer table may not be able to support accurate buffer status information reporting due to the increase in peak rate caused by the introduction of carrier aggregation and uplink MIMO. To ensure a consistent 6-bit buffer status, one solution is to increase this maximum with coarse granularity, ie to accommodate the increasing total buffer size at increasing peak rates. , The difference between adjacent indexed buffer sizes is increasing. For a solution with a coarse-grained table, the present invention proposes the following enhanced solution. Both padding BSR and standard / periodic BSR are used together, thereby providing more accurate BSR information. In addition, the R (reserved) bit in the MAC subheader can be used to distinguish the original BSR information from the increment information.

  For example, two MAC PDUs are transmitted in one TTI. Standard / periodic BSR is triggered and transmitted in one MAC PDU, and padding BSR is supported in the other remaining MAC PDUs. In one embodiment, there is only one LCG, the actual buffer amount is 11148 bytes, and according to Table 1, the standard / periodic BSR reporting index is 61 (109439 <buffer status 111148 <= 128125). . Further, the padding BSR reports an index of 1709 (1709 = 1111148-109439) as 34 (1552 <buffer status 1709 <= 1817), and the R bit in the MAC subheader where the padding BSR is located is, for example, 10709 Is set to 1 indicating that it is an increment. Thus, more accurate uplink buffer size information can be provided when increment information is reported in the padding BSR.

  In other embodiments, more accurate information may be provided with a multi-level increment method. 3 MAC PDUs are sent in one TTI, standard / periodic BSR is triggered and sent in one MAC PDU, and there is only one LCG and the actual buffer size is 11148 bytes, and padding The description will be made with an example of a situation where BSR is supported in both of the other two MAC PDUs. One skilled in the art can include four fields, each R / R / E / LCID, included in the MAC PDU subheader, eg, the first R bit can be set as an identifier for the first level increment, and the second R bit can be set It can be seen that it can be set as an identifier for the second level increment. The padding BSR of the first MAC PDU is then indexed as 61, the padding BSR of the second MAC PDU is indexed as 34 (1709 = 1111148-109439), and the padding BSR of the third MAC PDU is 19 ( 157 = 1709-1552).

  Each of the steps described above has been described from the perspective of the transmitter, i. In the following, a brief description will be given from the viewpoint of the base station 2, that is, the receiver. The base station 2 receives the MAC PDU from the user equipment 1, and then the base station 2 receives the MAC PDU from which the BSR is encapsulated. The BSR message is retrieved according to the method by which the user equipment 1 is encapsulated, thereby allocating uplink resources to the user equipment 1 and scheduling.

  FIG. 6 shows a block diagram of a device according to an embodiment of the present invention, where the device 10 is located in the user device shown in FIG. The apparatus 10 includes a first acquisition device 100, a generation device 101, and a reporting device 102. In some embodiments, the user equipment is comprised of multiple component carriers.

  First, the first acquisition device 100 is configured to acquire the amount of data to be transmitted after each media access layer protocol data unit corresponding to each component carrier is generated. The

  The generation device 101 is then configured to generate an uplink buffer status report message according to the amount of data to be transmitted. Also,

  The reporting device 102 is then configured to report an uplink buffer status report message to the base station 2.

  In an embodiment, the reporting device 102 is further configured to send an uplink buffer status report message to a base station serving the user equipment via one of the at least one component carrier. Composed.

  In one embodiment, each media access layer protocol data unit corresponds to a logical channel having a different priority, and the generation device 101 has an uplink buffer status report message and the highest priority. Further configured to encapsulate the data corresponding to the logical channel into a media access layer protocol data unit, the reporting device 102 sends an uplink buffer to the base station 2 serving the user equipment 1 • further configured to transmit a media access layer protocol data unit in which the status report message is encapsulated;

  In an embodiment, the generation unit 101 generates an uplink buffer status report message in the first media access layer protocol data unit to at least one other having padding bits. Further configured to repeatedly fill at least a portion of the contents of the uplink buffer status report message in the padding bits of the media access layer protocol data unit.

  The transmitting device 102 then reports an uplink buffer status report message to the base station 2 via the first component carrier while the base station 2 via the at least one other component carrier. Is further configured to report at least a portion of the content of the uplink buffer status report message.

  For example, the generation device 101 further includes:

  A second acquisition device configured to acquire the size of the padding bits. Also,

  The generation device 101 may have at least one other media access layer protocol protocol with padding bits if the padding bits are sufficient to contain all the contents of the uplink buffer status report message. It is further configured to repeatedly fill all the contents of the uplink buffer status report message in the padding bits of the data unit.

  Alternatively, the generation device 101 can copy a portion of the content of the uplink buffer status report message in the padding bits of at least one other media access layer protocol data unit that has padding bits. Further configured to fill repeatedly.

In another embodiment, the media access layer protocol data unit over each component carrier is generated serially, and the uplink buffer status report message is sent to the first media carrier over the component carrier. If originally scheduled to be transmitted via an access layer protocol data unit, the generation device 101 is encapsulated prior to the first media access layer protocol data unit, Further configured to include at least a portion of an uplink buffer status report message in padding bits of at least one preceding media access layer protocol data unit; Thus, the device 10 may receive at least one preceding media access layer protocol data if the overall uplink buffer status report message or part of the uplink buffer status report message. A decision device (not shown) configured to determine whether it is included in the padding bits of the unit;
If the overall uplink buffer status report message is included in the padding bits of at least one first media access layer protocol data unit, the uplink buffer status report Encapsulate the data content within the portion of the first media access layer protocol data unit originally scheduled to send the message, or
The first media access layer protocol if a part of the uplink buffer status report message is included in the padding bits of at least one first media access layer protocol data unit; It is further configured to encapsulate the remaining uplink buffer status report message in the data unit to encapsulate the data content in the spare part.

Furthermore, in other embodiments, the generation device 101 is
-Further configured to generate standard or periodic uplink buffer status report messages and padding uplink buffer status report messages, respectively, according to the amount of data to be transmitted, A periodic uplink buffer status report message is used to represent the first value range in which the amount of data to be transmitted is located, and the padding uplink buffer status report message is The difference between the amount of data to be transmitted and the lower limit of the first value range is used to represent the second value range located. (Claims 8 and 15)

  It should be noted that the above-described embodiments are illustrative and do not limit the present invention. Any technical solutions that do not depart from the spirit of the present invention are within the scope of the present invention, which are the use of different technical features that appear in different embodiments, and possible combinations of scheduling methods to achieve advantageous effects. Is included. Furthermore, any reference signs in the claims should not be construed as limiting the scope of the claims, and the term "comprising" is listed in other claims or descriptions ( Does not exclude a device or step, “a / an” preceding the device does not exclude the presence of a plurality of such devices, and one or more functions of the devices included in the apparatus are hardware Or it can be executed by the same module in software, and the terms “first”, “second”, etc. are intended only to indicate names and not for any particular order.

Claims (15)

A method for reporting an uplink buffer status report message in a user equipment configured with multiple component carriers, comprising:
A. Obtaining the amount of data to be transmitted after each media access layer protocol data unit corresponding to the respective component carrier is generated;
B. Generating the uplink buffer status report message according to the amount of data to be transmitted;
C. Reporting the uplink buffer status report message to a base station serving the user equipment. Step C is
The method further comprising: transmitting the uplink buffer status report message to the base station serving the user equipment via one of the plurality of component carriers. The method described. Each of the media access layer protocol data units corresponds to a logical channel having a different priority;
Encapsulating the uplink buffer status report message and data corresponding to the logical channel with the highest priority in a media access layer protocol data unit;
Step C is
Further comprising transmitting the media access layer protocol data unit encapsulating the uplink buffer status report message to the base station serving the user equipment. The method of claim 2. Said step B placing said uplink buffer status report message in a first media access layer protocol data unit; and at least one other media access comprising said padding bits Repetitively placing at least part of the content of the uplink buffer status report message in the padding bits of the layer protocol data unit;
Said step C reporting said uplink buffer status report message to said base station via a first component carrier corresponding to said first media access layer protocol data unit; The uplink buffer status report message to the base station via at least one other component carrier corresponding to the at least one other media access layer protocol data unit The method of claim 1, further comprising reporting the at least part of the content. The step of repeatedly placing
I. Obtaining a size of the padding bits;
II. If the padding bits are sufficient to contain all the content of the uplink buffer status report message, the at least one other media access layer protocol protocol with the padding bits Repetitively placing all the contents of the uplink buffer status report message in the padding bits of a data unit;
II '. If not, the content of the content of the uplink buffer status report message in the padding bits of the at least one other media access layer protocol data unit having the padding bits. The method according to claim 4, wherein a part is repeatedly arranged. The uplink buffer status report message includes uplink buffer status information for each of the logical channel groups having different priorities, and the step II '
The uplink buffer status report message is repeatedly arranged in the padding bits of the at least one other media access layer protocol data unit having the padding bits; 6. The method of claim 5, further comprising filling the corresponding uplink buffer status information with the priority of the logical channel group. The media access layer protocol data unit over the respective component carrier is generated serially, and the uplink buffer status report message is sent through a second media access layer over the component carrier. If originally scheduled to be transmitted via a protocol data unit, said step B
The uplink buffer in padding bits of at least one preceding media access layer protocol data unit encapsulated prior to the second media access layer protocol data unit Further comprising a step including at least part of a status report message;
After step B,
The overall uplink buffer status report message, or part of the uplink buffer status report message, is the at least one preceding media access layer protocol data unit; Determining whether to fall within said padding bits;
-If the overall uplink buffer status report message is included in the padding bits of the at least one preceding media access layer protocol data unit, the uplink buffer buffer Encapsulating data content within the portion of the second media access layer protocol data unit originally scheduled to send a status report message, or
If the portion of the uplink buffer status report message is included in the padding bits of the at least one preceding media access layer protocol data unit, the remaining uplink The method further comprises: encapsulating a buffer status report message in the second media access layer protocol data unit to encapsulate data content in a spare portion. the method of. Step B is
Generating a standard or periodic uplink buffer status report message and a padding uplink buffer status report message according to the amount of data to be transmitted, respectively, Or a periodic uplink buffer status report message is used to represent a first value range in which the amount of data to be transmitted is located, and the padding uplink buffer status report The message according to claim 1, wherein a message is used to represent a second value range in which the difference between the amount of data to be transmitted and the lower limit of the first value range is located. Method. An apparatus for reporting an uplink buffer status report message in a user equipment configured with a plurality of component carriers, comprising:
A first acquisition device configured to acquire an amount of data to be transmitted after each media access layer protocol data unit corresponding to the respective component carrier is generated;
A generating device configured to generate the uplink buffer status report message according to the amount of data to be transmitted;
And a reporting device configured to report the uplink buffer status report message to a base station serving the user equipment. The reporting device is
-Further configured to transmit the uplink buffer status report message to the base station serving the user equipment via one of the plurality of component carriers. 9. The apparatus according to 9. The respective media access layer protocol data units correspond to logical channels having different priorities;
Further configured to encapsulate the uplink buffer status report message and data corresponding to the logical channel with the highest priority into a media access layer protocol data unit;
The reporting device is
Further configured to transmit the media access layer protocol data unit encapsulating the uplink buffer status report message to the base station serving the user equipment. The apparatus according to claim 10. The generating unit generates the uplink buffer status report message in a first media access layer protocol data unit to generate at least one other media access having the padding bits; Further configured to repeatedly fill at least part of the content of the uplink buffer status report message in the padding bits of the layer protocol data unit;
The reporting device reports the uplink buffer status report message to the base station via a first component carrier corresponding to the first media access layer protocol data unit; Meanwhile, the uplink buffer status report message of the uplink buffer status report message to the base station via at least one other component carrier corresponding to the at least one other media access layer protocol data unit. The apparatus of claim 9, further configured to report the at least a portion of content. The generating device is
A second acquisition device configured to acquire a size of the padding bits;
If the padding bits are sufficient to contain all the content of the uplink buffer status report message, the at least one other media access layer protocol protocol with the padding bits The generating device further configured to repeatedly fill all the contents of the uplink buffer status report message in the padding bits of a data unit;
If not enough, the generating device may report the uplink buffer status report in the padding bits of the at least one other media access layer protocol data unit having the padding bits. The apparatus of claim 12, further configured to repeatedly fill a portion of the content of a message. The media access layer protocol data unit over the respective component carrier is generated serially, and the uplink buffer status report message is sent over a first media access layer over the component carrier. If originally scheduled to be transmitted via a protocol data unit, the generating device
The uplink buffer in padding bits of at least one preceding media access layer protocol data unit encapsulated prior to the second media access layer protocol data unit Further configured to include at least part of the status report message;
The device is
The overall uplink buffer status report message, or part of the uplink buffer status report message, is the at least one preceding media access layer protocol data unit; Further comprising a determination device configured to determine whether it is included in the padding bits of
The generating device is
-If the overall uplink buffer status report message is included in the padding bits of the at least one preceding media access layer protocol data unit, the uplink buffer buffer Encapsulate data content within the portion of the second media access layer protocol data unit originally scheduled to send a status report message, or
If the portion of the uplink buffer status report message is included in the padding bits of the at least one preceding media access layer protocol data unit, the remaining uplink 10. The buffer status report message is further configured to encapsulate in the second media access layer protocol data unit to encapsulate data content in a spare portion. The device described. The generating device is
-Further configured to generate a standard or periodic uplink buffer status report message and a padding uplink buffer status report message, respectively, according to the amount of data to be transmitted; A standard or periodic uplink buffer status report message is used to represent a first value range in which the amount of data to be transmitted is located, and the padding uplink buffer status The report message is used to represent a second value range in which a difference between the amount of data to be transmitted and a lower limit of the first value range is located. Equipment.

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